What I learned today

I learned a lot about gmail which I have never used before. I imported contacts from my EC account so that I have everybody on the course in my email contacts.I learned how to save attachments to a file & then how to then retrieve them. Also how to send them as an attachment to an email. I am hoping to learn how to set up & use a better email for business use. I also would like to know methods to open attachments that won’t open.